<style scoped>
    @import 'styles/common.css';
</style>
<template>
    <div>
<!--     <transition :name="transitionName">  
        <router-view></router-view>
    </transition> -->
        <router-view></router-view>
    </div>
    
</template>
<script>
    export default {
        data () {
            return {
                transitionName:''
            }
        },
         watch: {//使用watch 监听$router的变化
            $route(to, from) {
              //如果to索引大于from索引,判断为前进状态,反之则为后退状态
              if(to.meta.index > from.meta.index){
                //设置动画名称
                this.transitionName = 'slide-left';
              }else{
                this.transitionName = 'slide-right';
              }
            }
          },
        mounted () {

        },
        beforeDestroy () {

        },
        methods: {

        }
    }
</script>
<style type="text/css" >
.slide-right-enter-active,
.slide-right-leave-active,
.slide-left-enter-active,
.slide-left-leave-active {
  will-change: transform;
  transition: all 500ms;
  position: absolute;
}
.slide-right-enter {
  opacity: 0;
  transform: translate3d(-100%, 0, 0);
}
.slide-right-leave-active {
  opacity: 0;
  transform: translate3d(100%, 0, 0);
}
.slide-left-enter {
  opacity: 0;
  transform: translate3d(100%, 0, 0);
}
.slide-left-leave-active {
  opacity: 0;
  transform: translate3d(-100%, 0, 0);
}

    
</style>